|
| Indices | Correlation coefficients () (95% significance level) | Time lags (months) |
|
| Sunspot number | −0.91 ± 0.01 | +14 |
| Coronal mass ejections index | −0.84 ± 0.01 | 0 |
| Interplanetary magnetic field IMF | −0.86 ± 0.01 | +1 |
| Heliospheric current sheet HCS | −0.82 ± 0.01 | +8 |
|